{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"4404098","name":"No 2"},"operator":{"type":"operator","id":"P03983","name":"B P & K Mining Inc"},"controller":{"type":"controller","id":"C03276","name":"Kenneth  Hurley; Bernie  Hurley"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03276","name":"Bernie  Hurley et al"},"object":{"type":"mine","id":"4404098","name":"No 2"},"validFrom":"1975-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404098|C03276|1975-05-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03774","name":"Laurel Creek Coal Company Inc"},"object":{"type":"mine","id":"4404098","name":"No 2"},"validFrom":"1975-05-19","validTo":"1977-06-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404098|P03774|1975-05-19|1977-06-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03110","name":"Chaney J D"},"object":{"type":"mine","id":"4404098","name":"No 2"},"validFrom":"1975-05-19","validTo":"1981-03-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404098|C03110|1975-05-19|1981-03-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03110","name":"Chaney J D"},"object":{"type":"operator","id":"P03774","name":"Laurel Creek Coal Company Inc"},"validFrom":"1975-05-19","validTo":"1977-06-22","current":false,"derived":true,"evidenceMineId":"4404098","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404098|P03774|1975-05-19|C03110|1975-05-19|61967"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03983","name":"B P & K Mining Inc"},"object":{"type":"mine","id":"4404098","name":"No 2"},"validFrom":"1977-06-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404098|P03983|1977-06-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03276","name":"Bernie  Hurley et al"},"object":{"type":"operator","id":"P03983","name":"B P & K Mining Inc"},"validFrom":"1977-06-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"4404098","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404098|P03983|1977-06-23|C03276|1975-05-01|62367"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03276","name":"Kenneth  Hurley et al"},"object":{"type":"operator","id":"P03983","name":"B P & K Mining Inc"},"validFrom":"1977-06-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"4404098","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4404098|P03983|1977-06-23|C03276|1975-05-01|62368"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4404098","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}